What you need is a single pole double throw 12 volt relay. Wire it so that
the center leg gets power when the key is on run position and then use the
temp sensor to open or close one side of the coil so that when you turn the
key on you get low speed and when the temp sensor connects the relay coil it
switches to high speed. Experiment to see which wire is hi and which is lo.
1 of them will be ground. If I knew more about your temp sensor I could
draw you a diagram.
----- Original Message -----
From: "TonyC" <acellan1@tampabay.rr.com>
To: "DML" <dakota-truck@dakota-truck.net>
Sent: Monday, May 27, 2002 3:49 PM
Subject: DML: Has anyone wired up a 2 speed electric fan?
>
> I got an electric fan out of a Viper. Its a two speed fan. I'm trying to
> figure out how to wire it up so that slow runs constantly, and high when
it
> reachs a temp setting.
>
> I have a temp sensor from the perma cool that is already installed, along
> with an override switch for constant on at the moment?
>
> The Viper fan has 3 wires. It looks like 1 ground and 2 hots.
>
> TIA
> TonyC
>
>
>
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